Module::CPANfile(3) | User Contributed Perl Documentation | Module::CPANfile(3) |
NAME¶
Module::CPANfile - Parse cpanfile
SYNOPSIS¶
use Module::CPANfile; my $file = Module::CPANfile->load("cpanfile"); my $prereqs = $file->prereqs; # CPAN::Meta::Prereqs object my @features = $file->features; # CPAN::Meta::Feature objects my $merged_prereqs = $file->prereqs_with(@identifiers); # CPAN::Meta::Prereqs $file->merge_meta('MYMETA.json');
DESCRIPTION¶
Module::CPANfile is a tool to handle cpanfile format to load application specific dependencies, not just for CPAN distributions.
METHODS¶
- load
-
$file = Module::CPANfile->load; $file = Module::CPANfile->load('cpanfile');
Load and parse a cpanfile. By default it tries to load "cpanfile" in the current directory, unless you pass the path to its argument.
- from_prereqs
-
$file = Module::CPANfile->from_prereqs({ runtime => { requires => { DBI => '1.000' } }, });
Creates a new Module::CPANfile object from prereqs hash you can get via CPAN::Meta's "prereqs", or CPAN::Meta::Prereqs' "as_string_hash".
# read MYMETA, then feed the prereqs to create Module::CPANfile my $meta = CPAN::Meta->load_file('MYMETA.json'); my $file = Module::CPANfile->from_prereqs($meta->prereqs); # load cpanfile, then recreate it with round-trip my $file = Module::CPANfile->load('cpanfile'); $file = Module::CPANfile->from_prereqs($file->prereq_specs); # or $file->prereqs->as_string_hash
- prereqs
- Returns CPAN::Meta::Prereqs object out of the parsed cpanfile.
- prereq_specs
- Returns a hash reference that should be passed to "CPAN::Meta::Prereqs->new".
- features
- Returns a list of features available in the cpanfile as CPAN::Meta::Feature.
- prereqs_with(@identifiers), effective_prereqs(\@identifiers)
- Returns CPAN::Meta::Prereqs object, with merged prereqs for features identified with the @identifiers.
- to_string($include_empty)
-
$file->to_string; $file->to_string(1);
Returns a canonical string (code) representation for cpanfile. Useful if you want to convert CPAN::Meta::Prereqs to a new cpanfile.
# read MYMETA's prereqs and print cpanfile representation of it my $meta = CPAN::Meta->load_file('MYMETA.json'); my $file = Module::CPANfile->from_prereqs($meta->prereqs); print $file->to_string;
By default, it omits the phase where there're no modules registered. If you pass the argument of a true value, it will print them as well.
- save
-
$file->save('cpanfile');
Saves the currently loaded prereqs as a new "cpanfile" by calling "to_string". Beware this method will overwrite the existing cpanfile without any warning or backup. Taking a backup or giving warnings to users is a caller's responsibility.
# Read MYMETA.json and creates a new cpanfile my $meta = CPAN::Meta->load_file('MYMETA.json'); my $file = Module::CPANfile->from_prereqs($meta->prereqs); $file->save('cpanfile');
- merge_meta
-
$file->merge_meta('META.yml'); $file->merge_meta('MYMETA.json', '2.0');
Merge the effective prereqs with Meta specification loaded from the given META file, using CPAN::Meta. You can specify the META spec version in the second argument, which defaults to 1.4 in case the given file is YAML, and 2 if it is JSON.
- options_for_module
-
my $options = $file->options_for_module($module);
Returns the extra options specified for a given module as a hash reference. Returns "undef" when the given module is not specified in the "cpanfile".
For example,
# cpanfile requires 'Plack', '1.000', dist => "MIYAGAWA/Plack-1.000.tar.gz"; # ... my $file = Module::CPANfile->load; my $options = $file->options_for_module('Plack'); # => { dist => "MIYAGAWA/Plack-1.000.tar.gz" }
AUTHOR¶
Tatsuhiko Miyagawa
SEE ALSO¶
cpanfile, CPAN::Meta, CPAN::Meta::Spec
2021-08-09 | perl v5.32.1 |